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This application note describes the usage of FFSWrapper Module in the AudioWeaver Designer and demonstrates its uses.
FFSWrapper Module
The FFS Wrapper module wraps Flash File System into RAM memory. The module can be found in Sound Design ->Control -> FFSWrapper in the Module Bar on the left-hand side of AudioWeaver Designer.
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Figure 1: FFSWrapper Module Location
Module Functional Description
This module accepts file system start address on input pin, constructs file system structure instance and send it through the output pin. This module supports additional argument through which user can specify Audio Weaver Flash File System (.bin) file name to simulate functionality on Native-PC target.
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Figure 2: Starting Address provided to the Module
Input/Output Pins
FFSStartAddr is the input pin for this module which accepts the file system start address. After that the module constructs the file system structure instance.
FFSInstancePtr is the output pin for this module which takes the constructed file system structure instance and passes it through the output pin.
Arguments
Arguments can be found Rt Click View Properties second tab in the properties as shown. The figure below shows that the FFS Wrapper has only one Argument; FFSFileName where we input the name and path of the AWE Flash File System (.bin) file.
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Figure 3: Arguments in FFS Wrapper Module
Workings
To explain the workings of this module we will be using a simple general-purpose example. In this we input the path and name of the .bin file to a FileMemoryBuffer module. To create the .bin from your .wav files follow these steps.
Wave Library Generation
For generating a Binary (.bin) file, we will be using a DSP Concepts tool WaveLibraryGenetrator. Open the WaveLibraryGenerator tool, Add the wav/ogg files by ‘Add File(s)’ button as per the order you require. Select the Target Directory and the Target File name as shown in the figure below. Press Generate.
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The output of the tool consists of a Binary file (.bin) with the selected wav/ogg files along with an encoded list of the file names in the order added in the Tool window as .csv. This .csv file is used to upload into the TableSource module for Index mapping. It also creates a text document with a list of files as shown in the figure below.
Figure 5: WaveLibraryGenrator Output
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